Demountable rim.



ELI R. COX, 0F LADONIA, TEXAS.

. DEMOUNTABLE RIM.

'Specification of Letters Patent.

Patented Jan. 28, 1913.

Application led .Tune 7, 1912. Serial No. 702,295.

T o al( whom 'it may concern.'

Be it known that I, ELI R. Cox, a citizen of' the United States. residing at. Ladonia, in the county of Fannin andl State of Texas, have invented newand useful Improvements in I`)emountable Rims, of which the following is a specification.

This invention is an improved demountable rim for use on automobile wheels and by means of which a tire may be readily mount- -ed and removed, thc invention consisting in the construction, combination and arrangement vof devices hereinafter described and claimed.

In the accompanying drawing t-Figure 1 is partly an elevation and partly a sectional view otl a portion of the telly of a wheel provided with a dcinountable rim constructed in accordance with my invention. Fig. 2 is a detail sectional view on the plane indicated by thc line (if-0. of Fig. l. Fig. B is a similar view on the plane indicated by the line /-b of Fig. 1. Fig. i is a detail transverse sectional View on the plane indicated by the line cdc of Fig. l. Fig. is a detail planet' a portion of the den'iountable rim showing one ot the lugs having a V-S'naped groove.

The'xed rim of an automobile wheel is, for the purposes ot this specification, indiv cated at l and in accordance with my invention is provided on its periphery with a series of lugs 2 and a lug 3, the said lugs heing arranged at suitable regular distances apart. The peripheral surfaces of the said lugs are inclined as at t so that in effect the ext-renie diameter of the fixed rim is greater on the inner side of the wheel than on the outer side thereof and the fixed rim is practically of truncated conical forni. The lug 3 is provided with a transverse grow 5 which is widened at its outer end as at (3 at the side corresponding' with the outer side of the wheel. Each of the lugs 2 is provided with a centrally arranged radial projecting locking stud T'. The demountable rim S provided on its inner side with a centrally arranged annular flange 9 which flange is provided with inwardly projecting radially arranged lugs lO-ll which correspond, respectively, with the lugs ffy-2, the inner faces of which converge in one direction so that in effect the inner diameter of the lug flange of the demountable rim is smaller at the outer side of the demountable rim than at the inner side thereof. The deinountable rim is adapted to fit on the fixed rim of the wheel with its lug 11 in engagement with the lug 3 gagement with the lugs 2. The lug l0 has a groove 1Qwhieh corresponds with the groove 5 and each of the lugs 10 is provided with a V-shaped groove 13, the said groove-S13 being ,adapted to receive the studs 7 of the fixed rim. The said studs are so spaced from the outer side of the fixed rim that when they are engaged with the grooves 13, each of the said studs will be in one arm of one of said grooves at a point about midway between its inner and outer ends. Owing to the inclined arrangement of the arms of the grooves 13 the tendency of the studs 7 Will be to lock the demountable rim on the fixed rim under the driving stress and in assembling the parts the studs 7 should be arranged in the "frontarms of the grooves 13 or in-other words, in those arms of the grooves which are in front when the wheels revolve in the direction required to drive the vehicle ahead. Owing to the substantial frnstocon i'cal form of the fixed rim and the similar form of the seatformed in the demountable rim, the latter is prevented from slipping laterally in one di rection. T o eltectually prevent the dcmount-able rim from casually slipping in the reverse direction, I provide a bolt 14, the stem of which is arranged to pass thrmigh the (mening in the opposing faces of the lugs 5%11 formed by the grooves 5-12 and the head of which is wedge-shaped as at l5 and is adapted to fit in the correspondinglyY shaped outer end of the said opening.

The nut. "i6 bears aga-inst the shouldersJ formed by those ends of the lugsA -ll, which are on the inner side of the wheel and serves to hold the locking bolt in place, will be understood. In practice, this nut will be provided with some suitable means for locking the same on the threaded portion of the stem of the bolt to keep it from becoming casually detached therefrom. In order to detach the demountable rim from the xed rim, it is only necessary to first take out the bolt 14 and t-he demonntable rim can then be readily removed from the fixed rim. Any suitable form of 'tire may be used on the demountable rim and the exterior construction of the demountable rim may be such. as is required to enable the tire to be secured thereon.

By provision of the V-shaped grooves 13,

and its lugs 10 in en 'loo the said grooves each provide an inclined or'angularly arranged arm for engagement by one of the studs of the fixed rim according to the side of the car in which the whee is used. y

In order to facilitate the removal of the demountable rim from the 'iked rim, I pro-l vide the opposing and bearing surfaces or lugs of the Vdemountable rim and fixed rim g with transverse cross section-ally rectangular 'T- tion of t-he several parts without departing from the spirit of my invention and within the scope of the appended claim,

I claim:-

In combinationv with a fixed wheel rim provided with peripheral lugs having radial studs and also provided with a'peripheral lug havin a transverse groove widened at one side osaid rim, a demountable rirn having lan annular ange on its inncr side provided with inwardly project-ing radial lugs to fit on the first-mentioned lugs of the fixed rim and provided ,with V-shaped grooves to receive the studs of said firstmentioned lugs, said grooves extending to and being open at one side of the demountable rim, the said demountable riln being j also provided with a lug to fit on the other lug of the fixed rim having a transverse groove widened at one side of said demount-able rim, a bolt in said transverse grooves of said rims and having a wedgeshaped head fitting in the widened portions of said grooves, and a nut on the stern of the bolt' and bearing against the shoulders formed by the said transversely grooved lugs.

In testimony whereof I aix my signature in presence of two witnesses.

ELI R. COX. Witnesses:

A. B. Cox, P. T. HooUs.

Copies of this patent may be obtained for ve ents each, by addressing the Gommissioner o( Patents,

' Washington, D. C. 

